DEKKER Vacuum Technologies, Inc. – HullVac / September 2016
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Oil Analysis
DEKKER offers oil analysis to customers, regardless of the age of their system. Collect approximately 1 pint
from the machine in a clean bottle of any type and secure it. On the bottle and/or a packing list, please
include the following: system serial number, the type of oil, the run hours on the oil and machine, and note
any problems you are having with the system if applicable, as well as the system process conditions.
Also make sure to provide contact information along with an email address. After the analysis is complete,
DEKKER will provide a report of the condition of the oil, along with recommendations.
Send to:
DEKKER Vacuum Technologies, Inc.
935 S. Woodland Ave.
Michigan City, IN 46360
United States
ATTN: After Sales
Gas Ballast Valve(s)
The gas ballast is a method of operating the pump to help prevent vapors from condensing into liquids in the
pump oil. Properly applied, it works well with water vapor and reasonably well with some other condensable
vapors. The drawback of using the gas ballast is that it will limit the ultimate vacuum the pump can attain. To
engage, open one or both ball valves depending on the degree of ballasting required to clear the condensable
contamination from the oil supply. There will be a slight change in the sound of the pump and the base
pressure will rise slightly. Excessive heat will be generated when the valves are open and care must be given to
ensure adequate cooling water flow. Be sure the pump body temperature does not exceed 180°F as measured
on the casting surface below the sight port.
Oil Solenoid Valve
The oil solenoid valve located under the exhaust port prevents oil from filling into the pumping chamber when
the pump is turned off or when there is a power failure.
It is critical that this valve operates properly
. If
the valve malfunctions in an open position, oil will flow back into the pumping chamber when the pump is shut
off. This will result in hard starting, excessive belt wear, and possible equipment damage.
If the valve is stuck in the closed position, poor vacuum performance will result. If the pump is operated for
longer than a minute without oil, internal damage may occur. The condition of the solenoid valve interior will
mirror the condition of the oil reservoir housing. If there is a buildup of sludge, varnish, or particulate in the oil
reservoir, the solenoid valve body may be likewise contaminated.
Motor Bearing Lubrication (where required)
The motors are shipped from the factory with the bearings properly packed with grease. After extended
storage of 6 months or greater, the ball bearings should be re-lubricated prior to starting with a good quality
high temperature lithium based grease of #2 consistency. Typical products are Texaco Premium RB and
Chevron SR1 #2. Roller-bearings (V-belt drive systems) use the Texaco Premium RB or Chevron Black Pearl
EP #2.
The bearings may be lubricated with the motor running or stationary. Stationary with the motor warm is
preferred. Locate the grease inlets; there is one on each end of the motor.
Note:
This is generally the case with domestic motors. European motors use sealed bearings and do not
require lubrication. Consult factory with any questions.